Fenproporex Citrate from China
Fenproporex citrate combines the INN compound with citric acid, forming a stable salt under HTS 2926.30.10.00 for nitrile-function compounds and salts. Used in analytical standards for doping control testing. This biocompatible salt improves aqueous solubility over the hydrochloride.
Duty Rate — China → United States
125%
Rate breakdown
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
9903.04.60100%Pharmaceuticals Annex IV: patented pharma articles — 100% floor rate
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
Import Tips
• Provide HPLC purity certificate (>99%) to confirm chemical identity
• Register with CBP for controlled substance precursors
• Use UN-approved packaging for Schedule IV analogs during transport